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Journal Article

Oxygen incorporation into Fe-doped SrTiO3: Mechanistic interpretation of the surface reaction

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Merkle,  R.
Department Physical Chemistry of Solids (Joachim Maier), Max Planck Institute for Solid State Research, Max Planck Society;

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Maier,  J.
Department Physical Chemistry of Solids (Joachim Maier), Max Planck Institute for Solid State Research, Max Planck Society;

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Citation

Merkle, R., & Maier, J. (2002). Oxygen incorporation into Fe-doped SrTiO3: Mechanistic interpretation of the surface reaction. Physical Chemistry Chemical Physics, 4(17), 4140-4148.


Cite as: https://hdl.handle.net/21.11116/0000-000E-EA35-F
Abstract
The surface part of the oxygen incorporation reaction into the
model material Fe-doped SrTiO3 is investigated by in situ
optical spectroscopy. Experiments close to and far from
equilibrium ( small and large pO(2) changes) and the effect of
UV irradiation on the reaction rate allow us to draw the
following conclusions with respect to the kinetic processes at
the surface: (i) molecular oxygen species participate in or
before the rate determining step (RDS), and (ii) a single
conduction band electron participates in or before the RDS of
the incorporation reaction even though the bulk is p-type
conducting. Probable reaction mechanisms comprising
chemisorption, charge transfer, dissociation and oxygen ion
transfer steps are discussed.